A scientist grows plant cells in a nutrient solution. The cell membrane is partially permeable.
At the time the measurements are made, oxygen and ion M are entering the cells.
| Measurement | Nutrient solution | Inside a cell |
|---|---|---|
| Oxygen concentration in mg per dm³ | 8.4 | 2.1 |
| Ion M concentration in mmol per dm³ | 0.25 | 4.50 |
| Total solute concentration in mol per dm³ | 0.18 | 0.32 |
Explain how the concentration data show that oxygen and ion M enter the cells by different transport processes.
Predict the direction of the net movement of water. Explain your answer.
140 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.